Tek 576


tek 576 curve tracer #B283924; the screen trace is intermittent when Display (Invert ) switch (467A) is in the released position. In the pressed position, the trace is normal (I am using it
in the pressed (invert) position). the switch is located on the Display Switching Ckt. Bd. (4-29,5-12). Does anyone know of a quick fix/tips to clean/replace this switch???????????

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